.about-us-banner img {
    width: 100%;
}
body{
    font-family: Source-Han-Normal;
}
.banner {
    width: 100%;
}
h1{
    text-align: center;
}
article h1{
    color: #333333;
}
article p{
    text-align: center;
    color: #333333;
}
.line-title{
    font-weight: bold;
}
.h1-red{
    color: #b5191f;
    text-transform: uppercase;
}
h2{
    color: #d3261d;
    text-align: center;
    font-weight: bold;
    position: relative;
}
h2:before{
    position: absolute;
    bottom: -10px;
    left: calc(50% - 20px);
    content: '';
    width: 40px;
    border-bottom: 2px solid #d3261d;
}
.advantage {
    margin-top: 20px;
}
.advantage ul, .advantage p{
    margin-top: 20px;
    color: #333333;
}
.advantage p{
    text-align: justify;
    line-height: 20px;
}
.advantage ul li{
    text-align: center;
    line-height: 20px;
}
.h3-red{
    color: #d3261d;
    font-weight: bold;
    text-align: center;
    margin-top: 40px;
    margin-bottom: 40px;
}
.show-product{
    background-color: #7e7d7d;
}
.carousel-indicators{
    margin:0;
}
.carousel-indicators li{
    position: relative;
}
.carousel-indicators li img{
    position: absolute;
    top: 0;
    left: 0;
}
.certificate ul li{
    float: left;
}
.certificate ul li img{
    width: 100%;
}
#show_big{
    display: none;
    width: 400px;
    height: 580px;
}
#show_big_img{
    width: 100%;
}
.open{
    display: block;
}

@media only screen and (max-width:575.98px ) {
    .container{
        max-width: calc(100% - 20px);
        margin-left: 10px;
    }
    .header{
        margin-left: 0;
        max-width: 100%;
    }
    h1{
        font-size: 2rem;
        margin-top: 20px;
        margin-bottom: 10px;
    }
    hr{
        width: 50px;
    }
    .about-us article{
        margin-top: 30px;
    }
    .about-us article p{
        font-size: 1.4rem;
    }
    /*展示产品*/
    .carousel-indicators {
        height: 40px;
    }
    .carousel-indicators li{
        width: 15%;
    }
    .certificate ul li {
        width: 20%;
    }
    /*资质证书*/
    .certificate .certificate-img ul:nth-child(2) li{
        width: 50%;
    }
    .customer img{
        width: 100%;
    }
}
@media only screen and (min-width: 575.98px){
    .container{
        max-width: 500px;
    }
    h1{
        font-size: 2.4rem;
        margin-bottom: 10px;
    }
    hr{
        width: 50px;
    }
    article{
        margin-top: 100px;
    }
    .about-us article p{
        font-size: 1.4rem;
        margin-top: 10px;
        margin-bottom: 0;
    }
    /*展示产品*/
    .carousel-indicators {
        height: 55px;
    }
    .carousel-indicators li{
        width: 15%;
    }
    .certificate ul li {
        width: 20%;
    }
    /*资质证书*/
    .certificate .certificate-img ul:nth-child(2) li{
        width: 50%;
    }
    .customer{
        margin-top: 100px;
    }
    .customer img{
        width: 100%;
    }

}

@media only screen and (min-width: 768px) {
    .container{
        max-width: 700px;
    }
    h1{
        font-size: 2.6rem;
        margin-top: 10px;
    }
    article p{
        font-size: 14px;
    }
    .advantage ul li,.advantage p{
        font-size: 14px;
    }
    /*展示产品*/
    .carousel-indicators {
        height: 70px;
    }

}

@media only screen and (min-width: 992px) {
    .container{
        max-width: 900px;
    }
    h1{
        font-size: 2.8rem;
    }
    hr{
        width: 50px;
    }
    .carousel-indicators {
        height: 90px;
    }
    .carousel-indicators li{
        cursor: pointer;
    }

}

@media only screen and (min-width: 1200px) {
    .container{
        max-width: 1000px;
    }
    h1{
        font-size: 3rem;
        margin-top: 10px;
    }
    h2{
        font-size: 2.5rem;
        margin-bottom: 25px;
    }
    hr{
        width: 50px;
    }
    .line-title {
        margin-bottom: 30px;
    }
    .line-title span{
        font-weight: normal;
    }

    /*展示产品*/
    .carousel-indicators {
        height: 100px;
    }
    .carousel-control-prev, .carousel-control-next{
        top: 85%;
        bottom: 0;
        width: 50px;
        height: 50px;
    }
    .carousel-control-prev{
        left: -10%;
    }

    .carousel-control-next{
        right: -10%;
    }
    /*资质理念*/
    .advantage {
        margin-top: 80px;
    }
    .about-ability{
        margin-bottom: 100px;
    }
    .certificate .certificate-img ul:nth-child(1){
        width: 75%;
        float: left;
    }
    .certificate .certificate-img ul:nth-child(1) li{
        width: 17%;
        margin-right: 3%;
        margin-bottom: 10px;
    }
    .certificate .certificate-img ul:nth-child(2){
        width: 25%;
        float: left;
    }
    .certificate .certificate-img ul:nth-child(2) li{
        width: 100%;
        height: 180px;
        margin-bottom: 10px;
    }
    .certificate .certificate-img ul:nth-child(2) li img{
        height: 100%;
    }
    .customer img{
        width: 80%;
        margin-left: 10%;
    }
}
@media only screen and (min-width: 1500px) {
    .container {
        max-width: 1200px;
    }
    /*展示产品*/
    .carousel-indicators {
        height: 120px;
    }
    .certificate .certificate-img ul:nth-child(2) li{
        width: 100%;
        height: 216px;
        margin-bottom: 10px;
    }
}